hibernate: many-to-many mapping with mapping-table

<set name="items" table="campaignlist" >
<key column="campaign_id"/>
<many-to-many class="Item" column="mediaitem_id"/>
</set>

OR

<bag name="otherOptions" table="JOB_FINISHING_OPTION">
<key column="JOB_ID"/>
<many-to-many class="com.au.fxa.dsc.soms.model.PrintFinishOption" column="POC_ID"/>
</bag>